/Engine/Source/Editor/ContentBrowserData/Public/ContentBrowserItemData.h
Get the complete invariant path that uniquely identifies this item within its owner data source (eg, "/MyRoot/MyFolder/MyFile"). This path will be the same regardless of the options being toggled 'Show All Folder' or 'Organize Folders'
[FName](API\Runtime\Core\UObject\FName) GetInvariantPath() const